Multiple Choice Question

Consider this variation on the DoublyLinkedList implementation from class public class DoublyLinkedList ( private Node head, tail; private static class Node f public Node prev, next; public String data; public Node (Node prev, String data, Node next) this. prev = prev; this.next-next; this . data data; public DoublyLinkedList) head tail null; k xk *Add data to the end (tail) of the DoublyLinkedList public void add (String data) if (tailnull) { head = tail = new Node(null, data, null); else assert (tail.nextnull); tail.next new Node(tail, data, null); tail-tail.next; *Retrieve an element from the middle of the list @param i Zero-based index of the element to retrieve *@return The element (TBD: what to do ifi is invalid) public String get(int i) { Node current head; for (int j = 0; j